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Calculating Ndi correctly

KKISHA12y ago
In the Dec 2009 , question 3- Alaska Salvage I set down the Nd1 in as the same in the examiner answer however I am getting the incorrect answer. Can you guide in as to the order in which this should be done. IN 85/90 I GOT - 0.0571 + ( this is the second part I got .35) The denominator I got .4472
John MoffatJohn MoffatTutor12y ago#1
Your denominator is correct: 0.4472 For the numerator, ln(85/90) = - 0.0572 (0.05 + 0.5 x 0.2^2) x 5 = (0.05 + 0.5 x 0.04) x 5 = (0.05 + 0.02) x 5 = 0.35 So the total numerator is - 0.0572 + 0.35 = + 0.2928 So d1 = 0.2928 / 0.4472 = 0.6547
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